You mean the Usenet model, which worked for decades and is still working, does, in fact, work? Amazing. Edited to add: OK, that comes off as a bit mean. I'm le

You mean the Usenet model, which worked for decades and is still working, does, in fact, work? Amazing. Edited to add: OK, that comes off as a bit mean. I'm leaving it in case someone likes it, which really just goes to show my point: Beyond a certain size, it's impossible to please everyone. You can please a good standard deviation or so worth of people, but you do that by offering content which almost aggressively cuts off the long tails. Think prime time TV circa 1990. The smaller voices just get drowned out. The solution is so rock-simple obvious to me that I'm surprised it isn't standard practice: Allow the users to create newsgroups (or subreddits, or fora...) and let them manage them mostly-autonomously. Allow the small voices a place to dominate. If they want echo chambers, fine: The mainstream is even more of an echo chamber for people who live almost exclusively in the mainstream.